CVE-2026-66639Network attack vector

Stored XSS via undisclosed input

Published Aug 18, 2026 · Updated Aug 18, 2026

Stored XSS in WPZOOM WPZOOM Forms before 2.0.5 allows remote authenticated users to execute script in a victim browser via crafted form content. Patchstack classifies the bug as contributor-level stored XSS, but the public CVE, NVD, and Patchstack records do not identify the vulnerable field, endpoint, or output path that fails to neutralize contributor-supplied data. Exploitation requires contributor access and a second user to load the tainted content, so exposure depends on whether higher-privileged users review or render attacker-controlled form data.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in WPZOOM WPZOOM Forms before 2.0.5 allows remote authenticated users to execute script in a victim browser via crafted form content. Patchstack classifies the bug as contributor-level stored XSS, but the public CVE, NVD, and Patchstack records do not identify the vulnerable field, endpoint, or output path that fails to neutralize contributor-supplied data. Exploitation requires contributor access and a second user to load the tainted content, so exposure depends on whether higher-privileged users review or render attacker-controlled form data.

The record

CVE
CVE-2026-66639
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
WPZOOM
Product
WPZOOM Forms
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=2.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WPZOOM · WPZOOM Formsversion=n/a <=2.0.4

Published CVSS scores

6.5PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
T1059.007JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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